Messages in this thread | | | Date | Wed, 24 Oct 2001 16:48:37 -0700 | From | Mike Fedyk <> | Subject | Re: howto see shmem |
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On Wed, Oct 24, 2001 at 07:37:26PM -0400, Robert Love wrote: > On Wed, 2001-10-24 at 19:27, Mart?n Marqu?s wrote: > > [...] > > ------ Shared Memory Segments -------- > > key shmid owner perms bytes nattch status > > 0x00000000 65536 nobody 600 46084 11 dest > > [...] > > I can see 46084 bytes in shared memory used by the apache. > > Am I wrong? > > Nope. Applications know how much the are sharing because they can > easily see what region of memory is shared/mapped into their's. > > The reason the kernel can't figure out the net shared memory is because > there is no simple way -- it has to add up the shared regions of all > applications, counting each shared segment only once. Too much work. >
Actually, if it's done in the COW code, you could quite possibly get most of it right there...
Does anyone know of something that can make use of the shmem accting? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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